Elevator-booster for flour-conveyers



UNITED STATES PATENT OFFICE.

EDWARD D. TSCI-IACHE, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO WASHBURNCROSBY COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPORATION.

ELEVATOR-BOOSTER I FLOUR-CONVEYERS.

1,se1,2e4.

T 0 all whom it may concern.

Be it known that I, EDWARD D. TSOHAOHE, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and usefulImprovements in Elevator-Boosters for Flour-Conveyers, of which the following is a specification.

My invention relates to elevator boosters for flour conveyers and hasfor an object to provide an apparatus for boosting or elevating sacks offlour in a conveyer system without liability of the sacks beingjarredoff the apparatus while they are being elevated. The full objects andadvantages of my in vention will appear in connection with the detaileddescription thereof and the novel features embodied in my inventive ideawill be particularly pointed out in the claims.

Referring to the accompanying draw- 1ngs,

Figure 1 is a front elevational view. Fig. 2 is a view mostly in sectionon the line 22 of Fig. 1.

In the particular construction shown in the drawings 12 designates abelt traveling in the direction of the arrow a for carrying filled andclosed sacks of flour in an upright position until they reach a tippingbar 13 at the delivery end of the belt. This bar is so positioned thatthe belt will carry sacks of fiour over the bar until the center ofgravity of the sacks is slightly beyond the bar. This causes the sacksto tip over into recumbent position so as to lie transversely upon ashort endless belt 14 positioned adjacent the delivery end of the belt 712 with its direction of travel at right angles to the direction oftravel of the belt 12. The upper stretch of the belt 14 travels in thedirection of the arrow b and is positioned at a somewhat lower levelthan the belt 12. The belt 14 passes around rollers 16 and 18 and theupper stretch thereof is supported by idlers 20. A driving pulley 17 issecured to the shaft of one of the end rollers. Adjacent the deliveryend of the belt 14 is a comb 22 attached to the frame 24. An endlesselevating belt 26 passes over an upper roller 28 and a lower roller 80,the shafts of these rollers being mounted in the side members 32 and 84of the supporting frame. A driving pulley 29 is secured to the shaft ofthe upper roller. Attached to the belt 26 at regular intervals are setsof Specification of Letters Patent.

Patented Dec. 7, 1920.

App1ication filed December 26, 1918. Serial No. 268,327.

sack-elevating members 36 consisting of fingers adapted to pass betweenthe teeth of the comb 22. Adjacent the upper or delivery end of the belt26 is an inclined plate 38 having teeth 40 between which the fingers ofthe lifting members 36 are adapted to pass. Running underneath the lowerend of the plate is the receiving end of a traveling belt 42. Theelevating belt 26 is supported by a fiat upwardly-inclined member 44. Inorder to retain the sacks upon the fingers 36 while they are beingelevated the following construction is provided: A grating consisting oflongitudinal bars 46 and crossbars 48 and 50 is provided at its upperend with a hinge 52 which is secured to a support such as a beam 54 nearthe upper end of the elevating belt. Each end of the crossbar 50 isextended beyond the grating, and these ends are provided with holesthrough which extend rods 56 attached at one end to the side members 32and 34, respectively. The rods 56 are provided with screw-threads whichextend from their free ends for a considerable distance, and each rodintermediate its ends is provided with a nut 58 which constitutes anadjustable stop to limit the inward movement of the grating. The outerend of each rod is pro vided with a nut 60, and between each. of

these nuts and the bar 50 is placed a coiled compression spring 62.These springs serve to hold the grating yieldingly toward the elevatingbelt 26.

The operation and advantages of my invention will be readily understoodfrom the foregoing description. Sacks of flour are engaged and lifted bythe fingers 36, and as the sacks are elevated they are yieldinglyengaged by the grating which presses the sacks toward the elevating beltand prevents them from being jarred off the fingers. The amount ofinward movement of the grating may be regulated by the adjustable nuts58.

I claim:

1. An elevator booster for flour conveyers comprising an elevating belt,sack-engaging members attached to sa1d belt, a plurality of longitudinalbars pivotally attached to a support adjacent the upperend of said belt,

a crossbar secured to said longitudinal bars, rods attached to the frameof said belt,'said rods extending through holes in the ends of saidcrossbar, nuts on the free ends of said rods, and compression springsbetween said nuts and said crossbar.

2. An elevator booster for flour conveyers comprising an elevating belt,sack-engaging members attached to said belt, a plurality of longitudinalbars pivotally attached to a support adjacent the upper end of saidbelt, a crossbar secured to said longitudinal bars, rods attached to theframe of said belt, said rods extending through holes in the ends ofsaid crossbar, nuts on the free ends of said rods, compression springsbetween said nuts and said crossbar, and stops on said rods for limitingthe forward movement of said 1ongitudinal bars.

3. An elevator booster for flour conveyers comprising an elevating belt,sack-engaging fingers attached to said belt, a plurality of longitudinalbars hinged to a support adj acent the upper end of said belt, acrossbar secured to said longitudinal bars between the ends thereof, theends of said crossbar extending beyond said longitudinal bars and beingprovided with holes, screwthreaded rods attachedto the frame of saidbelt and extending through said holes, nuts on the outer ends of saidrods, and compression springs between said nuts and said crossbar.

In testimony whereof I hereunto affix my signature.

EDWARD D. TSCHAOHE.

